Most of my bands were 4 piece (guitar, bass, drums,vocal). I played in 2 bands that had 2 guitarist and one that had a keyboard player. Nobody could sing in any of them!!! Now that I'm just jacking around in my studio, I'm suddenly running into a bunch of really good singers. Go figure.

The band I play in, Moodswings, has 25. That's six vocalists, four saxes, four trombones, four trumpets, two soundmen, bass, guitar, keyboard, vibes, and drums. We're all together at the bottom of this page (new window).

As Robin says, they're a lot of fun. On the down side, pretty much anything split 25 ways comes out to gas money. And it seems like, with that many, there's always a personality conflict somewhere.

A band I'm in, Local Disturbance, has 4, sometimes 5 players. But sometimes others are encouraged to sit in, typically on percussion or horns, and at one point we had 14 people on stage "helping" us. OY!

hmm, I wasn't thinking of classical groups when I started this thread, but John's post jogged my memory. The absolute biggest performance I've ever been a part of was a ~120 person symphony and 200+ choir.